I have had major issues with my JTV 69 staying in tune. It will not stay in tune for more then a few minutes (usually goes sharp). I have a replacement neck from Warmoth (that I love -- all maple Vortex with stainless frets). I had a guitar tech look at it and he recommended a Super-Vee Mag-Lok. I think this has addressed the tuning issue, but I hate the way it makes the trem feel. It's difficult to use it subtly (it would work okay for dive-bombs, but I am more of a Bigsby type player). Is this a common issue with this variax? I have also replaced the pups with Lace Sensor Rainbow pack and also love the mag sound now. I really want to stay with the variax, should I sell it and buy a new one? Do I need a USA version?
note: Using Nanoweb 10's